First of all if you want child support you have to file for it and establish paternity. Since you did neither why should you get support for all those years? Because Dad is a Dr now?> And what does his wife have anything to do with this? she is not responsible for supporting children that are not hers. So you married a man, and now that you are divorced you want to go after Dad for all thise back years you failed to do anything? That is what is wrong with so many women, why woulkd you do that? You get child support from the time you file, and establish paternity and that it is.